Search results for "SAF"

Alla ricerca della sicurezza e della qualità: il modello di miglioramento dell'Oncologia Medica nel Policlinico Universitario di Palermo

2015

[In search of safety and quality: the improvement model proposed by the Oncology Department of the Palermo University] Over the past 20 years the field of oncology has product therapeutic innovations that have radically changed the prognosis of the most prevalent malignancies, since introduction of so-called targeted molecular agents. As a result of these changes, also the management of cancer patients has become more complex requiring technologies and skills that involve many professionals (medical oncologists, biologists, molecular geneticists, surgeons, pathologists, radiologists, nurses and psychologists), each engaged in a different stage of the disease, with the common goal of ensurin…

Desafíos del sindicalismo italiano ante el trabajo sindical con trabajadores ?contingentes? en Amazon

2021

The Market Reorientation of Farms: The Case of Olive Growing in the Nebrodi Area

2014

In addition to safeguarding the landscape, olive growing makes a unique contribution to protecting the environment and the agricultural ecosystem. Olive growing in mountainous and hilly areas is severely constrained by structural limitations. Rural tourism can be a potential strategy to increase the competitiveness of olive-growing activities. After an initial analysis of the relationship between landscape, tourism, and olive growing, this study focused on olive growing in the Nebrodi area. In particular, we examined two case studies of olive farms to analyze the related production costs and market positioning strategies.

N-Methylcaprolactam as a Dipolar Aprotic Solvent for Iron-Catalyzed Cross-Coupling Reactions: Matching Efficiency with Safer Reaction Media

2019

Although iron‐catalysis provides a powerful alternative to the more conventional palladium and nickel in the cross‐coupling arena, the major limitation is the necessity for carcinogenic N‐methylpyrrolidone as a co‐solvent in the vast majority of catalytic reactions. Herein, we introduce N‐methylcaprolactam as an efficient, non‐toxic and practical dipolar aprotic solvent for iron‐catalyzed C(sp2)−C(sp3) alkylative cross‐coupling of aryl chlorides and tosylates. The utility of this method is reflected by its wide substrate scope, high yields and capacity to cross‐couple challenging alkyl organometallics prone to b‐hydride elimination and homocoupling. Considering the broad utility of iron‐cat…

Why the Cosmological Constant Seems to Hardly Care About Quantum Vacuum Fluctuations: Surprises From Background Independent Coarse Graining

2020

International audience; Background Independence is a sine qua non for every satisfactory theory of Quantum Gravity. In particular if one tries to establish a corresponding notion of Wilsonian renormalization, or coarse graining, it presents a major conceptual and technical difficulty usually. In this paper we adopt the approach of the gravitational Effective Average Action and demonstrate that generically coarse graining in Quantum Gravity and in standard field theories on a non-dynamical spacetime are profoundly different. By means of a concrete example, which in connection with the cosmological constant problem is also interesting in its own right, we show that the surprising and sometime…

Ultrasonic inspection for the detection of debonding in CFRP-reinforced concrete

2017

Fibre-reinforced plastic (FRP) composites are extensively used to retrofit civil structures. However, the quality and the characteristics of the bond between the FRP and the structure are critical to ensure the efficacy of the retrofit. For this reason, effective non-destructive evaluation (NDE) methods are often necessary to assess the bonding conditions. This article presents an ultrasonic technique for detecting defects at the FRP-substrate interface. The technique uses the Akaike Information Criterion, to detect automatically the onset of the ultrasonic signals, and the novel Equivalent Time Lenght (ETL) parameter, to quantify the energy of the propagating ultrasonic signals along the i…

Impact behaviour of flax/epoxy composite plates

2015

This paper presents an experimental investigation of the impact behaviour of flax/epoxy composite plates submitted to low-velocity transverse impact. Low energy drop-weight impact tests have been performed on two types of quasi-isotropic flax/epoxy composites, rectangularly shaped with edges lengths of 142 mm × 94 mm and 2.85 mm thick. Residual properties have been assessed by compression after impact tests. A detailed description of damage development, especially the increase of the rear face crack with respect to the impact energy is given by the microscopic observation. The influence of impact damage on the residual strength is described. A loss of 15%–30% in compression resistance was n…

The control of the residual lifetimes of carbon fibre-reinforced composite pressure vessels

2015

International audience; The understanding of the degradation of carbon fibre composites, with emphasis on the use of these composites in filament-wound pressure vessels, is explored. Earlier studies by many researchers have led to a general appreciation of the mechanisms involved; however, only recently have both computational power and experimental techniques become sufficiently developed to allow for the use of quantitative analyses. It is shown that damage is controlled by fibre failure, and that initially this occurs randomly within the structure. In monotonic loading, the development of clusters of fibre breaks causes rapid failure; however, under maintained loads the kinetics of damag…

Trends of Organic Electrosynthesis by Using Boron-Doped Diamond Electrodes

2019

The electro-organic synthesis is currently experiencing a renaissance due to the tremendous contributions of various electrocatalytic materials as well as the use of electric current as an inexpensive and suitable reagent to drive the electrosynthetic transformations, avoiding conventional chemical oxidizers or reducing agents. Consequently, electrosynthesis has a significant technical impact, because these processes can be easily scaled up, benefiting from advantages such as versatility, environmental compatibility (possibility of recovering and recycling non-converted substrates), automation (switching on or off electric current), inherent safety and potential cost effectiveness among oth…

Application of the ESR spectrometry to evaluate the original dose in irradiated dried fruit

2008

The identification of irradiated dried fruit can be achieved by means of the electron spin resonance (ESR) spectrometry, as recommended by the European Community, since ionizing radiation induces free radicals in cellulose, a constituent of the shell. The aim of this work was to use the ESR spectrometry also as a quantitative procedure to evaluate the original dose in irradiated dried fruits, using the additive dose method. Little shell pieces, taken from nuts, chestnuts, peanuts and pistachios, were irradiated at “original” dose values in the range 1 to 8 kGy, and the ESR signal intensity was measured. Each specimen was then reirradiated with added doses of 1 kGy, and the ESR signal was me…